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A zinc ion in the active site of an enzyme can speed up the reaction by: A....

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Biology

A zinc ion in the active site of an enzyme can speed upthe reaction by:

A. Making a bound water molecule a more powerful nucleophile bydrawing electron density toward itself and facilitatingdeprotonation of the water

B. Orienting substrates for reaction

C. Stabilizing an anionic intermediate

D. All of these

E. None of these

The role of serine at the active site of serineproteases is to act as a ___ catalyst, while the histidine residueserves as an ___ catalyst.

A. acid-base, covalent

B. anionic; ionic

C. covalent; acid-base

D. strong; weak

E. weak; strong

The active site of an enzyme is being investigated bymutagenesis to determine the stability of the enzyme conformationfollowing substrate binding. A leucine is replaced by glycine. Thischange will:

A. Destabilize the enzyme

B. Stabilize the enzyme

C. Have no effect on the enzyme

Answer & Explanation Solved by verified expert
4.4 Ratings (602 Votes)
Ans1 Option D is correct All of the above Zinc ion functions as a Lewis acid in all catalytic reactions All of the actions given in options A B and C can be carried out by the zinc    See Answer
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